EP0539005A1 - Interrupteur de fin de course - Google Patents

Interrupteur de fin de course Download PDF

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Publication number
EP0539005A1
EP0539005A1 EP92308164A EP92308164A EP0539005A1 EP 0539005 A1 EP0539005 A1 EP 0539005A1 EP 92308164 A EP92308164 A EP 92308164A EP 92308164 A EP92308164 A EP 92308164A EP 0539005 A1 EP0539005 A1 EP 0539005A1
Authority
EP
European Patent Office
Prior art keywords
switch
rotary shaft
housing
limit switch
cam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP92308164A
Other languages
German (de)
English (en)
Inventor
Kenji Shinohara
Shigenobu Kishi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Omron Corp
Original Assignee
Omron Corp
Omron Tateisi Electronics Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP3262697A external-priority patent/JPH05109344A/ja
Priority claimed from JP3262696A external-priority patent/JPH05101746A/ja
Priority claimed from JP26270091A external-priority patent/JPH05109346A/ja
Priority claimed from JP3262699A external-priority patent/JPH05109345A/ja
Application filed by Omron Corp, Omron Tateisi Electronics Co filed Critical Omron Corp
Publication of EP0539005A1 publication Critical patent/EP0539005A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02—Details
    • H01H21/18—Movable parts; Contacts mounted thereon
    • H01H21/22—Operating parts, e.g. handle
    • H01H21/24—Operating parts, e.g. handle biased to return to normal position upon removal of operating force
    • H01H21/28—Operating parts, e.g. handle biased to return to normal position upon removal of operating force adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02—Details
    • H01H21/18—Movable parts; Contacts mounted thereon
    • H01H21/22—Operating parts, e.g. handle
    • H01H21/24—Operating parts, e.g. handle biased to return to normal position upon removal of operating force
    • H01H21/28—Operating parts, e.g. handle biased to return to normal position upon removal of operating force adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
    • H01H21/285—Operating parts, e.g. handle biased to return to normal position upon removal of operating force adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift having an operating arm actuated by the movement of the body and mounted on an axis converting its rotating movement into a rectilinear switch activating movement

Definitions

  • This invention relates to a limit switch which is used in a variety of manufacturing devices or industrial robots.
  • a conventional limit switch of this type is as shown in FIG. 24.
  • reference numeral 1 designates a housing which is made up of a switch housing body 3 incorporating a switch 2, and a cover 4 closing the side opening 3a of the switch housing body 3.
  • a head housing 5 is detachably engaged with the upper end opening 3b of the switch housing body 3 with a plurality of bolts (not shown).
  • the head housing 5 has a shaft hole 6, in which a rotary shaft 9 is rotatably fitted with a collar 7 and an O-ring 8 in such a manner that one end portion 9a of the rotary shaft 9 is extended outside the head housing 5.
  • An actuator 10 is mounted on the one end portion 9a of the rotary shaft 9 and fixed with a screw 11.
  • the actuator 10 includes a shaft member 13, on which a roller 12 is mounted.
  • the axis of the rotary shaft 9 is perpendicular to the axis of an operating rod 22 of the switch 2.
  • a flat cam 9c is formed on the other end portion 9b of the rotary shaft 9 in such a manner that it is located on the axis of the operating rod 22.
  • a bottomed-cylinder-shaped spring receiver 14 is placed on the cam 9c.
  • a return spring 15, which is a coiled spring, is set between the spring receiver 14 and the inner surface of the head housing 5, thus giving a rotational return force to the rotary shaft 9.
  • an operating plunger 16 is interposed between the cam 9c and the operating rod 22 of the switch 2.
  • the operating plunger 16 comprises a cylindrical plunger body 17, an auxiliary plunger 18 built in the plunger body 17, and a buffer spring 19 interposed between the plunger body and the auxiliary plunger.
  • the operating plunger 16 is axially movably inserted into the upper end opening 3b of the switch housing body 3.
  • a depressing pin 20 for depressing the operating rod 22 is secured to the end of the auxiliary plunger 18.
  • the switch housing body 3 has a lower end opening 3c, which is closed with a connector (not shown) to which electrical cables are connected.
  • the limit switch thus constructed operates as follows: When an object such as a workpiece under test abuts against the roller 12, the actuator 10 is turned about the rotary shaft 9 against the elastic force of the return spring. As the actuator 10 is turned in this way, the cam 9c is turned to push the operating plunger, so that the switch 2 is operated.
  • the motion converting mechanism In order to operate the switch 2, it is necessary to convert the rotational motion of the actuator 10 into the linear motion of the operating plunger 16. Therefore, the motion converting mechanism is intricate, and accordingly it needs a relatively large number of components, with a result that the limit switch is unavoidably bulky. Furthermore, the limit switch is relatively short in service life, because it has a number of slide parts, and suffers from unreasonable stress.
  • a preferable aim of the invention is to provide a limit switch which, when compared with the conventional one, is simple in construction, small in the number of components, small in size, and long in service life, and which operates satisfactorily at all times.
  • a limit switch which, according to the invention, comprises: a rotational operation section including a rotary shaft rotatably supported on a housing and an actuator for turning the rotary shaft; a switch section provided below the rotational operation section, and wherein the rotational operation section is associated with the switch section without providing a plunger between the rotational operation section and the switch section.
  • the rotational motion of the rotary shaft is directly detected by the detector to perform switch operation.
  • the switch operation may be performed directly by the rotational motion of the rotary shaft. Therefore, it is unnecessary for the limit switch to employ the mechanism which converts the rotational motion of the actuator into a linear motion.
  • the limit switch of the invention when compared with the conventional one, is small in the number of components, and it can be miniaturized accordingly.
  • the rotational operation section is not in contact with the switch section, and therefore the limit switch is free from unreasonable stress, which increases the service life.
  • the housing of the limit switch is made up of the switch housing and the head housing which are formed as one unit. Therefore, a sealing structure can be readily formed without provision of an elastic seal member between the two housings.
  • the limit switch includes no mechanism for converting rotational motion into linear motion, which eliminates the difficulty that the space in the switch housing changes in volume and in pressure. Therefore, the unsatisfactory operation due to the unsteady returning operation of the actuator can be eliminated; that is, the switching operation can be improved in response characteristic.
  • FIGS. 1 to 4 show an example of a limit switch, which constitutes a first embodiment of the invention.
  • the limit switch comprises: a housing A; a rotational operation section B mounted in the upper portion of the housing A; and a switch section C provided in the lower portion of the housing A.
  • the housing A as shown in FIGS. 2 and 3, comprises: a tubular switch housing 3; and a head housing 5 which is integral with one end opening 3b of the housing 3.
  • a shaft hole 6 is formed in one side of thee head housing 5, into which a rotary shaft 9 is inserted.
  • the rotary shaft 9 is rotatably fitted through an O-ring 8 in the shaft hole 6 of the head housing 5 in such a manner that one end portion 9a of the rotary shaft 9 is extended outside the head housing 5.
  • An actuator 10 together with a spacer 55 is mounted on the one end portion 9a of the rotary shaft in such a manner that the spacer 55 is located between the actuator and the head housing.
  • the actuator thus mounted is fixed with a screw 11.
  • the actuator 10 includes a shaft member 13, on which a roller 12 is mounted.
  • the other end portion 9b of the rotary shaft 9 is inserted into a cam 25.
  • the cam 25 comprises: a boss 25b defining a shaft hole 25a into which the other end portion 9b of the rotary shaft 9 is inserted; an arcuate spring-receiving protrusion 25c which is coaxial with the boss 25b and radially spaced a predetermined distance from the latter 25b; and a cam protrusion 25d protruded radially from the outer cylindrical wall of the boss 25b.
  • a pair of electrically conductive parts 27a and 27b which is to be detected (hereinafter referred to as “particular detection parts 27a and 27b", when applicable) are mounted on the outer cylindrical surface of the cam protrusion 25d in such a manner that they are circumferentially spaced a predetermined distance from each other.
  • the aforementioned switch section C is made up of a proximity switch.
  • the proximity switch comprises: a switch casing 28; a detector 29 mounted on the inner surface of the casing 28; and a printed circuit board 30 on which predetermined electrical circuit elements such as an oscillation circuit and a signal processing circuit have been mounted.
  • Electrical elements forming the electrical circuit, and operation indicating light-emitting elements 54 are mounted on the printed circuit board 30.
  • Lead wires 31 connected to the lead pattern of the printed circuit board are connected to a connector 37 mounted on a cover 36, so that they are extended outside the switch housing 3 through the lower end opening 3c.
  • the switch housing 3 is filled with synthetic resin 38 which is an electrically insulating material, so that the detector 29, the printed circuit board 30, etc. are molded with the resin.
  • the detector 29, as shown in FIG. 4, comprises: a coil spool 41 on which a detecting coil 42 has been wound; and a core 43 of magnetic material having an annular recess 43a, the core 43 being combined with the coil spool 41.
  • the detecting coil 42 wound on the coil spool 4 is fitted in the annular recess 43a of the core 43.
  • the leaders 42a of the coil 42 are electrically connected to predetermined electrical circuit elements, such as the aforementioned oscillation circuit and signal processing circuit, on the printed circuit board 30.
  • the actuator 10 When a moving object abuts against the roller 12, the actuator 10 is turned clockwise or counterclockwise (in the direction of the arrow b or in the direction of the arrow a in FIG. 2), and accordingly the rotary shaft 9 together with the cam 25 is turned in the same direction.
  • the limit switch In the limit switch, rotation of the rotary shaft 9 directly operates the proximity switch. This means that the limit switch can be formed without the mechanism which converts the rotational motion of the actuator 10 into a linear motion. Hence, the limit switch of the invention, when compared with the conventional one, is small in the number of components, and it can be miniaturized accordingly. In addition, in the limit switch of the invention, the rotational operation section B is not in contact with the switch section C, and therefore the limit switch is free from unreasonable stress, which lengthens the service life.
  • the housing A is made up of the switch housing 3 and the head housing 5 which are formed as one unit. Therefore, a sealing structure can be readily formed without provision of an elastic seal member between the housings 3 and 5. The sealing effect can be improved much by filling the switch housing 3 with synthetic resin 38 through the end opening 3c in such a manner as to resin-mold the electrical elements therein.
  • the limit switch includes no mechanism for converting rotational motion into linear motion, which eliminates the difficulty that the space in the switch housing changes in volume and in pressure. Therefore, the unsatisfactory operation is eliminated which is due to the unsteady returning operation of the actuator; that is, the switching operation is improved in response characteristic.
  • the switch section C is the proximity switch.
  • the switch section C may be made up of a light-transmission type photo-electric switch as shown in FIGS. 5 and 6.
  • the photo-electric switch comprises: a switch casing 28 having a U-shaped recess 28a; and a detector 29 including a light emitting element 47 and a light receiving element 48.
  • Those elements 47 and 48 are arranged in the switch casing 28 in such a manner that they are confronted with each other, so that, as shown in FIG. 6, a light beam 60 outputted by the light emitting element 47 is applied to the light receiving element 48 through through-holes 49 and 50 formed in the casing 28.
  • a light intercepting board 46 adapted to intercept the light beam 60 is rotatably provided in the above-described recess 28a.
  • the light intercepting board 46 is extended from the cam 25 fixedly mounted on the other end portion 9b of the rotary shaft 9, and has a pair of through-holes 46a and 46b which are formed in it with a predetermined angular interval therebetween.
  • the actuator 10 together with the light intercepting board 42 is turned clockwise or counterclockwise (in the direction of the arrow b or in the direction of arrow a in FIG. 6), so that the light beam 60 is applied through one of the through-holes 46a and 46b to the light receiving element 48.
  • the output signal of the light receiving element 48 is processed by the signal processing circuit on the printed circuit board, to provide a detection signal.
  • the above-described switch section C may be made up of a detector 29 which, as shown in FIG. 7, includes a magneto-electric conversion element 52, such as a Hall element, provided on the printed circuit board 30.
  • a magneto-electric conversion element 52 such as a Hall element
  • the magneto-electric conversion element 52 is built in the switch casing 28, and a magnet 51 for applying magnetic flux to the magneto-electric conversion element 51 is provided on the cam 25 which is fixedly mounted on the other end portion of the rotary shaft 9.
  • the actuator 10 When a moving object abuts against the roller 12, the actuator 10 together with the magnet 51 is turned. As a result, the electro-magnetic conversion element 52 is activated, so that a detection signal is provided with the aid of the signal procesing circuit on the printed circuit board 30.
  • the above-described limit switch may be so modified that, as shown in FIG. 8, the roller 12 is pushed by a dog D.
  • the switch section C is made up of a proximity switch similarly as in the first embodiment.
  • the above-described photo-electric switch or magneto-electric conversion switch may be employed.
  • a side opening (not shown), which is similar to the side opening 3a of the conventional limit switch shown in FIG. 24, is formed in one side of the switch housing 3, and it is closed with a cover.
  • the fifth embodiment has the same effects as the first through fourth embodiments.
  • FIGS. 9 and 10 show an example of a limit switch, which constitutes a sixth embodiment of the present invention.
  • the limit switch comprises: a housing A; a rotational operation section B mounted in the upper portion of the housing A; and a switch section C provided in the lower portion of the housing A.
  • the housing A comprises: a tubular switch housing 103; and a head housing 105 which is integral with one end opening 103b of the housing 103.
  • a shaft hole 106 is formed in one side of thee head housing 105, into which a rotary shaft 109 is inserted.
  • the rotary shaft 109 is rotatably fitted through an O-ring 108 in the shaft hole 106 of the head housing 105 in such a manner that one end portion 109a of the rotary shaft 109 is extended outside the head housing 105.
  • An actuator 110 is mounted on and fixed to the one end portion 109a Of the rotary shaft.
  • the actuator 110 includes a shaft member 113, on which a roller 112 is mounted.
  • the other end portion 109b of the rotary shaft 109 is inserted into a cam 125.
  • the cam 125 comprises: a boss 125b defining a shaft hole 125a into which the other end portion 109b of the rotary shaft 9 is inserted; an arcuate spring-receiving protrusion 125c which is coaxial with the boss 125b and radially spaced a predetermined distance from the latter 125b; and a cam protrusion 125d protruded radially from the outer cylindrical wall of the boss 125b.
  • a pair of magnetic elements 126a and 126b are mounted on the outer cylindrical surface of the cam protrusion 125d in such a manner that they are circumferentially spaced a predetermined distance from each other.
  • a return spring 127 which is a coiled spring, is coaxially wounded on the boss 125b of the cam 125 with its two ends engaged with locking grooves formed in the inner surface of the head housing 105. That is, the return spring 127 is elastically interposed between the inner surface of the head housing 105 and the cam 125 to give a rotational return force to the rotary shaft 109 and hold the latter 109 in neutral position.
  • the switch section C comprises a switch case 128, a terminal base 129 fittingly mounted onto a lower opening portion 128a of the switch case 128, and a contact mechanism 130 mounted on the base 129.
  • the switch mechanism 130 includes fixed terminals 132 and 133 respectively formed with fixed contacts 131a and 131b and a common terminal 135 on which a movable contact piece 134 is fixed.
  • the movable contact piece 134 is arranged such that a movable contact 136 provided on the contact piece 134 is confronted with the fixed contacts 131a and 131b.
  • the movable contact 136 can be brought in contact with each of the fixed contact 131a and 131b.
  • a magnet 137 is fixed onto the movable contact piece 134 so as to be confronted with an outer cylindrical surface of the cam protrusion 125d of the cam 125.
  • the switch section C is electrically connected to a printed circuit board on which predetermined electrical circuit elements such as a signal processing circuit or the like has been mounted.
  • Electrical elements 139 forming the electrical circuit, and operation indicating light-emitting elements 140 are mounted onto the printed circuit board 138 connected to lead wires of cable 141 extending outside the switch housing 103.
  • the switch housing 103 is filled with synthetic resin 143 (as indicated by x ) which is an electrically insulating material, so that portions of terminals 132, 133 and 135 extending downward from the terminal base 129 are molded with the resin.
  • a cover 144 is fittingly secured to the lower opening portion 103c of the switch housing 103.
  • the actuator 110 When a moving object abuts against the roller 112, the actuator 110 is turned clockwise or counterclockwise (in the direction of the arrow b or in the direction of the arrow a in FIG. 10), and accordingly the rotary shaft 109 together with the cam 125 is turned in the same direction.
  • the contact mechanism 130 is operated to be opened or closed so as to output a detection signal through the signal processing circuit.
  • This detection signal is also applied to the light emitting elements 140 so that this detecting operation can be visually confirmed with the aid of the light emitting elements 140.
  • the limit switch In the limit switch, rotation of the rotary shaft 109 directly operates the switch section C. This means that the limit switch can be formed without the mechanism which converts the rotational motion of the actuator 110 into a linear motion. Hence, the limit switch of the invention, when compared with the conventional one, is small in the number of components, and it can be miniaturized accordingly. In addition, in the limit switch of the invention, the rotational operation section B is not in contact with the switch section C, and therefore the limit switch is free from unreasonable stress, which lengthens the service life.
  • the housing A is made up of the switch housing 103 and the head housing 105 which are formed as one unit. Therefore, a sealing structure can be readily formed without provision of an elastic seal member between the housings 103 and 105. The sealing effect can be improved much by filling the switch housing 103 with synthetic resin 143 through the end opening 103c in such a manner as to resin-mold the terminal portions of the switch section C therein.
  • the limit switch includes no mechanism for converting rotational motion into linear motion, which eliminates the difficulty that the space in the switch housing changes in volume and in pressure. Therefore, the unsatisfactory operation is eliminated which is due to the unsteady returning operation of the actuator; that is, the switching operation is improved in response characteristic.
  • the aforementioned switch mechanism 130 have a contact switch construction with the movable contact piece 134, so that high-current flow/interrupt operation can be achieved.
  • a magnet which is attracted to or repulsed against the magnet 137 may be used in place of each of magnetic member 126a and 126b.
  • the magnet 137 may be replaced with a magnetic member.
  • a side opening (not shown), which is similar to the side opening 3a of the conventional limit switch shown in FIG. 24, is formed in one side of the switch housing 103, and it is closed with a cover.
  • the contact mechanism 130 is arranged such that a movable contact piece 134 is extended in a longitudinal direction parallel to the rotary shaft 109.
  • the movable contact piece 134 may be arranged to be extended in the longitudinal direction perpendicular to the rotary shaft 109 as shown in FIG. 11.
  • FIGS. 12 to 14 show an eighth embodiment of the present invention.
  • the basic construction of the eighth embodiment is similar to that of the aforementioned embodiments, so that only important or different portions thereof are described hereafter.
  • the cam protrusion is divided into two arc-shaped cam protrusions 225d and 225e each of which is protruded radially from the outer cylindrical wall of the boss 225b.
  • the switch section C is made up of a microswitch 228 having a contact mechanism operated to be opened and closed by depressing a pressure member 229.
  • the contact mechanism (not shown) is installed in a switch case.
  • Each mounting hole 231 formed in the switch case is fitted onto a corresponding projecting piece 230a provided on a switch holder 230 so that the microswitch 228 is held in place.
  • the opening on one side of the holder 230 is closed by a cover 232.
  • the switch holder 230 thus assembled with the microswitch 228 and the cover 232 is fixed to the switch housing 203 by caulking projections 203d projected from an inner wall of the switch housing 203 and inserted into respective mounting holes 230b.
  • the switch section C is electrically connected to a printed circuit board 233 on which an electrical element 234 forming predetermined circuit, an operation indicating light-emitting element 235 and so on are mounted.
  • the actuator 210 When a moving object such as a dog D abuts against the rollers 212, the actuator 210 is turned clockwise or counterclockwise (in the direction of the arrow b or in the direction of the arrow a in Fig. 14), and accordingly the rotary shaft 209 together with the cam 225 is turned in the same direction.
  • cam protrusions 225d and 225e abuts against the pressure member 229 to open/close the contact mechanism in the microswitch case, so that a detection signal is output through the signal processing circuit.
  • This detecting operation can be visually confirmed with the aid of the light emitting element to which the detection signal is applied.
  • a side opening (not shown), which is similar to the side opening 3a of the conventional limit switch shown in FIG. 24, is formed in one side of the switch housing 203, and it is closed with a cover.
  • FIGS. 15 to 18A show a ninth embodiment of the present invention.
  • This embodiment is similar to the above-mentioned eighth embodiment, but is different therefrom in that a swingable lever 241 is provided between the cam 225 and the microswitch 228.
  • the swingable lever 241 for depressing the pressure member 229 is fixed onto the switch housing 203 by caulking projections 203e provided on the inner wall of the switch housing 203 and inserted into respective mounting holes 41b shown in Fig. 18.
  • the swingable lever 241 is provided at its distal end 41c with bearing pieces 41d on which a roller 43 is mounted through a pin 242.
  • the actuator 210 When a moving object such as a dog D abuts against the rollers 212, the actuator 210 is turned clockwise or counterclockwise (in the direction of the arrow b or in the direction of the arrow a in Fig. 17), and accordingly the rotary shaft 209 together with the cam 225 is turned in the same direction.
  • a side opening (not shown), which is similar to the side opening 3a of the conventional limit switch shown in FIG. 24, is formed in one side of the switch housing 203, and it is closed with a cover.
  • the swingable lever 241 is extended in the longitudinal direction perpendicular to the rotary shaft 209.
  • the swingable member 241 may be extended in the longitudinal direction parallel to the rotary shaft 209, provided that the roller 243 is mounted on the distal end 241c of the swingable lever 241 perpendicularly to the longitudinal direction of the swingable lever 241 as shown in Fig. 18B.
  • the roller 243 can be dispensed with.
  • a distal end 241a of the swingable lever 241 is fixed onto the inner wall of the switch housing 203, but it may be supported onto a microswitch case 228a as shown in Fig. 23.
  • the swingable lever 241 may be formed as a separate member from the microswitch case 228a, or otherwise may be provided integrally with the microswitch case 228a.
  • the rotational motion of the rotary shaft is directly detected by the detector to perform switch operation or the switch operation is performed directly by the rotational motion of the rotary shaft. Therefore, it is unnecessary for the limit switch to employ the mechanism which converts the rotational motion of the actuator into a linear motion.
  • the limit switch described above when compared with the conventional one is small in the number of components, and it can be miniaturized accordingly.
  • the limit switch is constructed such that the rotational operation section is not in contact with the switch section, the limit switch is free from unreasonable stress, which increases the service life.
  • the switch can perform the high-current flow/interrupt switch operation.
  • the housing of the limit switch is made up of the switch housing and the head housing which are formed as one unit. Therefore, a sealing structure can be readily formed without provision of an elastic seal member between the two housings.
  • the limit switch includes no mechanism for converting rotational motion into linear motion, which eliminates the difficulty that the space in the switch housing changes in volume and in pressure. Therefore, the unsatisfactory operation is eliminated which is due to the unsteady returning operation of the actuator; that is, the switching operation is improved in response characteristic.
EP92308164A 1991-09-14 1992-09-09 Interrupteur de fin de course Withdrawn EP0539005A1 (fr)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP3262697A JPH05109344A (ja) 1991-09-14 1991-09-14 リミツトスイツチ
JP3262696A JPH05101746A (ja) 1991-09-14 1991-09-14 リミツトスイツチ
JP26270091A JPH05109346A (ja) 1991-09-14 1991-09-14 リミツトスイツチ
JP262696/91 1991-09-14
JP262700/91 1991-09-14
JP3262699A JPH05109345A (ja) 1991-09-14 1991-09-14 リミツトスイツチ
JP262699/91 1991-09-14
JP262697/91 1991-09-14

Publications (1)

Publication Number Publication Date
EP0539005A1 true EP0539005A1 (fr) 1993-04-28

Family

ID=27478623

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92308164A Withdrawn EP0539005A1 (fr) 1991-09-14 1992-09-09 Interrupteur de fin de course

Country Status (4)

Country Link
US (2) US5430264A (fr)
EP (1) EP0539005A1 (fr)
KR (1) KR930006769A (fr)
TW (1) TW208755B (fr)

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EP1399673A1 (fr) * 2001-06-07 2004-03-24 Aloys Wobben Dispositif d'interrupteur pourvu d'un arbre d'actionnement
CN102956393A (zh) * 2011-08-24 2013-03-06 欧姆龙株式会社 开关装置
CN103996559A (zh) * 2013-02-14 2014-08-20 欧姆龙株式会社 操作杆的密封结构及使用该密封结构的电动工具
WO2021175943A1 (fr) * 2020-03-05 2021-09-10 Framatome Gmbh Dispositif de détection pour détection de position d'objet mobile

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US6469265B1 (en) * 2001-06-05 2002-10-22 Delphi Technologies, Inc. Method and apparatus for a limit switch
US6664487B2 (en) * 2001-07-10 2003-12-16 Omron Corporation Limit switches
US6987230B2 (en) * 2003-09-05 2006-01-17 Dynamic Air Inc. Limit switch
US7148434B2 (en) * 2003-10-28 2006-12-12 Merry Yard Enterprise Corp. Gearshift mechanism for electromotive toy car
US7555997B2 (en) * 2003-11-12 2009-07-07 Triple Crown Dog Academy, Inc. Container apparatus and method
US7557315B2 (en) * 2006-02-24 2009-07-07 J-Star Motor Industrial Co., Ltd. Limit switch with two operation units controlled by a single control member
US7285739B1 (en) * 2006-03-31 2007-10-23 Zippy Technology Corp. Waterproof structure for switch pins
JP4765855B2 (ja) * 2006-09-13 2011-09-07 パナソニック株式会社 スイッチ装置
US8039769B2 (en) * 2006-09-19 2011-10-18 Deere & Company Joystick deactivation
US8317450B2 (en) * 2008-10-30 2012-11-27 Lam Research Corporation Tactile wafer lifter and methods for operating the same
JP5405240B2 (ja) * 2009-09-04 2014-02-05 株式会社マキタ 電動工具におけるレバーの防水構造
JP5870704B2 (ja) * 2012-01-13 2016-03-01 オムロン株式会社 リミットスイッチ、およびその製造方法
WO2014106538A1 (fr) * 2013-01-03 2014-07-10 Abb Technology Ag Ensemble support pour micro-commutateur d'un dispositif de commutation
CN103311020B (zh) * 2013-06-05 2016-03-23 苏州未来电器股份有限公司 一种带有霍尔传感器的操作机构
TWM533707U (en) * 2016-08-01 2016-12-11 Timotion Technology Co Ltd Micro linear actuator
CN111373501B (zh) * 2017-11-23 2023-01-24 世德科技有限责任两合公司 具有至少一个电开关元件和凸轮轴的开关装置
CN213094177U (zh) * 2020-05-13 2021-04-30 赛尔富电子有限公司 一种磁感应开关
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WO1996027946A1 (fr) * 1995-03-07 1996-09-12 Ericsson Inc. Commandes sans contact etanches a l'eau pour radiotelephones mobiles
EP1399673A1 (fr) * 2001-06-07 2004-03-24 Aloys Wobben Dispositif d'interrupteur pourvu d'un arbre d'actionnement
US7175390B2 (en) 2001-06-07 2007-02-13 Aloys Wobben Switching apparatus with an actuating shaft
EP1399673B1 (fr) * 2001-06-07 2010-09-29 Aloys Wobben Éolienne comprenant und dispositif d'interrupteur pourvu d'un arbre d'actionnement
CN102956393A (zh) * 2011-08-24 2013-03-06 欧姆龙株式会社 开关装置
CN103996559A (zh) * 2013-02-14 2014-08-20 欧姆龙株式会社 操作杆的密封结构及使用该密封结构的电动工具
EP2767997A3 (fr) * 2013-02-14 2014-10-22 Omron Corporation Structure d'étanchéité de levier et outil électrique équipé de celui-ci
EP3330991A1 (fr) * 2013-02-14 2018-06-06 Omron Corporation Structure d'étanchéité de levier et outil électrique équipé de celui-ci
WO2021175943A1 (fr) * 2020-03-05 2021-09-10 Framatome Gmbh Dispositif de détection pour détection de position d'objet mobile
US11862413B2 (en) 2020-03-05 2024-01-02 Framatome Gmbh Sensing device for sensing the position of a movable object

Also Published As

Publication number Publication date
KR930006769A (ko) 1993-04-21
US5552570A (en) 1996-09-03
TW208755B (fr) 1993-07-01
US5430264A (en) 1995-07-04

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